DriverHeaven's 11W ITX build

HammerSandwich · Post by **HammerSandwich** » Fri May 11, 2007 9:13 am

See it here. No moving parts and only 11W under load!

jaganath · Post by **jaganath** » Fri May 11, 2007 9:31 am

amazing; only 7W avg. consumption (xvid playback)! only problem is it's very expensive.

sareiodata · Post by **sareiodata** » Fri May 11, 2007 9:42 am

jaganath wrote:amazing; only 7W avg. consumption (xvid playback)! only problem is it's very expensive.

Hmmm...I wonder if you could run it on AA-batteries...I don't know why I would want to do that... but it would be something...

)

Mr Evil · Post by **Mr Evil** » Fri May 11, 2007 10:14 am

While 11W for an entire PC is impressive, I can't help but think that Via's processors aren't getting very good performance per watt: A 65nm Athlon64 x2 5000+ has a TDP of 65W and runs at 2.6GHz, 1.35V. Let's imagine that when underclocked to 1GHz it could run at 0.8V (my 4000+ can, so this seems likely). The new TDP will be approximately reduced to 65*(0.8^2)/(1.35^2) = 23W from the voltage reduction, and further down to 23*1/2.6 = 9W from the clock speed reduction. Somewhat more than the C7, but the performance will be about 3 times greater. I think Intel's current CPUs might be even better than that, but I can't be arsed to dig up more numbers.

I suppose the obstacle to achieving low system power consumption like that would be finding a low-power motherboard.

jaganath · Post by **jaganath** » Fri May 11, 2007 10:32 am

I think Intel's current CPUs might be even better than that

I doubt it; I've yet to hear of a C2D that can tolerate sub-0.95V, and the large cache and high idle consumption suggest sub-10W might be hard to achieve. However, Desktop CPU Power Survey showed Core Duo are excellent in this respect (1.5W consumption at idle).

wwenze · Post by **wwenze** » Thu May 31, 2007 12:20 am

Do the ULV mod on the mobile Core series processors then.

Remember that CPU that runs without a heatsink?

One · Post by **One** » Thu Jun 07, 2007 8:18 am

Does this new version take less watts than the older and slower VIA boards?

This new one costs 3 times more than the 600MHz versions, but I don't care about the speed, only the watts.